2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #if !defined(IB_ADDR_H)
38 #include <linux/in6.h>
39 #include <linux/if_arp.h>
40 #include <linux/netdevice.h>
41 #include <linux/socket.h>
42 #include <linux/if_vlan.h>
43 #include <rdma/ib_verbs.h>
44 #include <rdma/ib_pack.h>
47 struct rdma_addr_client {
49 struct completion comp;
53 * rdma_addr_register_client - Register an address client.
55 void rdma_addr_register_client(struct rdma_addr_client *client);
58 * rdma_addr_unregister_client - Deregister an address client.
59 * @client: Client object to deregister.
61 void rdma_addr_unregister_client(struct rdma_addr_client *client);
63 struct rdma_dev_addr {
64 unsigned char src_dev_addr[MAX_ADDR_LEN];
65 unsigned char dst_dev_addr[MAX_ADDR_LEN];
66 unsigned char broadcast[MAX_ADDR_LEN];
67 unsigned short dev_type;
69 enum rdma_transport_type transport;
73 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
76 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
80 * rdma_resolve_ip - Resolve source and destination IP addresses to
81 * RDMA hardware addresses.
82 * @client: Address client associated with request.
83 * @src_addr: An optional source address to use in the resolution. If a
84 * source address is not provided, a usable address will be returned via
86 * @dst_addr: The destination address to resolve.
87 * @addr: A reference to a data location that will receive the resolved
88 * addresses. The data location must remain valid until the callback has
90 * @timeout_ms: Amount of time to wait for the address resolution to complete.
91 * @callback: Call invoked once address resolution has completed, timed out,
92 * or been canceled. A status of 0 indicates success.
93 * @context: User-specified context associated with the call.
95 int rdma_resolve_ip(struct rdma_addr_client *client,
96 struct sockaddr *src_addr, struct sockaddr *dst_addr,
97 struct rdma_dev_addr *addr, int timeout_ms,
98 void (*callback)(int status, struct sockaddr *src_addr,
99 struct rdma_dev_addr *addr, void *context),
102 void rdma_addr_cancel(struct rdma_dev_addr *addr);
104 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
105 const unsigned char *dst_dev_addr);
107 int rdma_addr_size(struct sockaddr *addr);
109 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
110 int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac,
113 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
115 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
118 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
120 dev_addr->broadcast[8] = pkey >> 8;
121 dev_addr->broadcast[9] = (unsigned char) pkey;
124 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
127 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
130 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
132 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
135 static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid)
137 memset(gid->raw, 0, 16);
138 *((__be32 *) gid->raw) = cpu_to_be32(0xfe800000);
140 gid->raw[12] = vid & 0xff;
141 gid->raw[11] = vid >> 8;
146 memcpy(gid->raw + 13, mac + 3, 3);
147 memcpy(gid->raw + 8, mac, 3);
151 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
153 switch (addr->sa_family) {
155 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
156 addr)->sin_addr.s_addr,
157 (struct in6_addr *)gid);
160 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
168 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
169 static inline int rdma_gid2ip(struct sockaddr *out, union ib_gid *gid)
171 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
172 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
173 memset(out_in, 0, sizeof(*out_in));
174 out_in->sin_family = AF_INET;
175 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
177 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
178 memset(out_in, 0, sizeof(*out_in));
179 out_in->sin6_family = AF_INET6;
180 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
185 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
187 return dev->priv_flags & IFF_802_1Q_VLAN ?
188 vlan_dev_vlan_id(dev) : 0xffff;
191 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
194 struct net_device *dev;
197 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
199 vid = rdma_vlan_dev_vlan_id(dev);
203 iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid);
206 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
208 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
209 dev_addr->dev_type != ARPHRD_INFINIBAND)
210 iboe_addr_get_sgid(dev_addr, gid);
212 memcpy(gid, dev_addr->src_dev_addr +
213 rdma_addr_gid_offset(dev_addr), sizeof *gid);
216 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
218 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
221 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
223 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
226 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
228 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
231 static inline enum ib_mtu iboe_get_mtu(int mtu)
234 * reduce IB headers from effective IBoE MTU. 28 stands for
235 * atomic header which is the biggest possible header after BTH
237 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
239 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
241 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
243 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
245 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
247 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
253 static inline int iboe_get_rate(struct net_device *dev)
255 struct ethtool_cmd cmd;
260 err = __ethtool_get_settings(dev, &cmd);
263 return IB_RATE_PORT_CURRENT;
265 speed = ethtool_cmd_speed(&cmd);
267 return IB_RATE_40_GBPS;
268 else if (speed >= 30000)
269 return IB_RATE_30_GBPS;
270 else if (speed >= 20000)
271 return IB_RATE_20_GBPS;
272 else if (speed >= 10000)
273 return IB_RATE_10_GBPS;
275 return IB_RATE_PORT_CURRENT;
278 static inline int rdma_link_local_addr(struct in6_addr *addr)
280 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
281 addr->s6_addr32[1] == 0)
287 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
289 memcpy(mac, &addr->s6_addr[8], 3);
290 memcpy(mac + 3, &addr->s6_addr[13], 3);
294 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
296 return addr->s6_addr[0] == 0xff;
299 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
305 for (i = 2; i < 6; ++i)
306 mac[i] = addr->s6_addr[i + 10];
309 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
313 vid = dgid->raw[11] << 8 | dgid->raw[12];
314 return vid < 0x1000 ? vid : 0xffff;
317 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
319 return dev->priv_flags & IFF_802_1Q_VLAN ?
320 vlan_dev_real_dev(dev) : NULL;
323 #endif /* IB_ADDR_H */